Quectel RG520N Throughput

I have successfully connected the RG520N modem on 5G network using AT+QNPREFCFG=“mode_pref” and AT+QNPREFCFG=“nr5g_band” commands

But when I was using the modem for 5G network(SA) , I am getting the signal quality low. I am getting aroung 5 Mbps uplink throughput for n28 and 1 mbps uplink throughput for n78.

Also from the command AT+QENG=“servingcell”
RSRP= -104
RSRQ= -12

Also,
image

How can I solve this issue?

The issue has been solved. It was the coverage issue only